Gal-2 and Gal-4 do not induce PS exposure in activated T cells. (A) PHA-activated T cells or MOLT-4 cells were incubated with 10 μM Gal-2 or 3 μM Gal-4 for 9 hours in the absence of DTT, followed by detection for PS exposure. (B) Gal-4 or C2S-Gal-1 was incubated without DTT for the indicated time followed by treatment of HL60 cells for 4 hours and detection for PS exposure. Error bars represent the standard deviation of duplicate samples.